2015年,在广东省开平市某地发现近百年苏铁树被介壳虫危害近乎摧毁(图1)。经鉴定,该苏铁上共分布有两种介壳虫,分别为苏铁白轮盾介(Aulacaspis yasumatsui Takagi)和矢尖介(Unaspis yanonensis Kuwana)。由于此类害虫可隐藏在叶子基部、茎部和根部等隐蔽场所,较难发现,定殖后可快速繁殖,虫体布满整片叶,刺吸为害后造成叶片枯黄。为保护园林绿化景观和花农经济效益,现就这两种介壳虫的主要识别特征和防治技术介绍如下:识别特征苏铁白轮盾介,雌介壳白色,有时半透明,介 In 2015, it was discovered in a place in Kaiping City, Guangdong Province that the cycad was destroyed by scale insects for nearly a century (Figure 1). It has been identified that there are two kinds of scale insects distributed on the cycads, namely Aulacaspis yasumatsui Takagi and Unaspis yanonensis Kuwana. Because such pests can be hidden in the leaves of the base, stems and roots and other hidden places, more difficult to find, colonization can quickly multiply, parasites full of leaves, thorns damage caused after the leaves yellow. In order to protect the landscape of landscaping and the economic benefits of flower farmers, the main identification features and prevention and cure technologies of these two scale insects are introduced as follows: Identification Characteristics Cycads of the cycads, white and sometimes translucent,